Model (USA) Rule of Evidence 407: Subsequent remedial measures are not admissible as evidence to prove negligence, culpable conduct, a defect in a product or its design, or a need for a warning or instruction.
But the court may admit this evidence for another purpose, such as impeachment or — if disputed — proving ownership, control, or the feasibility of precautionary measures
EDIT: I’m not looking up the contextualing comments that accompany the rule, but I will share what I remember from law school many years ago: this rule exists for public safety. You don’t want to penalize fixing a dangerous situation, regardless of the facts of any specific case.
For all of those who are down voting the nope, read the instructions on how to apply in the post. You all failed that trick test teachers handed out in grade school, where if you actually read the instructions, it tells you to put your name on the paper and put down your pencil without trying to answer any of the questions on the test, because the test is “do you pay attention to shit” not “do you know the answers”.